Wireless communication system, wireless communication device, wireless communication method, and program

A wireless communication device capable of communication with another wireless communication device via a base station, comprising:

• a transmitting portion that transmits a first data frame of a particular frame type to the other wireless communication device via the base station;
• a receiving portion that, when the other wireless communication device has a direct communication function with the wireless communication device, receives a second data frame of the particular frame type that is transmitted from the other wireless communication device in response to the first data frame;
• and
• a determination portion that, when the receiving portion receives the second data frame from the other wireless communication device, determines that the other wireless communication device has the direct communication function,
• wherein when the wireless communication device determines that the other wireless communication device is capable of the direct communication function, the wireless communication device transmits a predetermined data frame to the other wireless communication device via the base station, and also transmits the predetermined data frame to the other wireless communication device directly, and
• the other wireless communication device sequentially measures signal quality of both the predetermined data frame directly received from the wireless communication device and the predetermined data frame received from the base station, and transmits the measured signal quality to the wireless communication device.

A wireless communication device capable of communication with another wireless communication device via a base station, comprising:

• a receiving portion that receives a first data frame of a particular frame type from the other wireless communication device;
• and
• a transmitting portion that, when the wireless communication device has a direct communication function with the other wireless communication device, transmits a second data frame of the particular frame type in response to the first data frame,
• wherein when the wireless communication device confirms a presence of the other wireless communication device based on a universal plug and play (UPnP) protocol, the wireless communication device transmits the second data frame.

A wireless communication method used by a wireless communication system that includes a first wireless communication device, a second wireless communication device, and a base station that relays wireless communication between the first and the second wireless communication devices, the wireless communication method comprising the steps of:

• transmitting a first data frame of a particular frame type from the first wireless communication device capable of direct communication with another wireless communication device to the second wireless communication device via the base station;
• receiving the first data frame by the second wireless communication device;
• transmitting a second data frame of the particular frame type from the second wireless communication device when the second wireless communication device is capable of the direct communication;
• receiving the second data frame by the first wireless communication device;
• and
• determining, by the first communication device, that the second wireless communication device is capable of the direct communication, wherein
• when the first wireless communication device determines that the second wireless communication device is capable of the direct communication, the first wireless communication device transmits a predetermined data frame,
• when the base station receives the predetermined data frame from the first wireless communication device, the base station transmits the predetermined data frame to the second wireless communication device, and
• the second wireless communication device measures signal quality of both the predetermined data frame transmitted from the first wireless communication device and the predetermined data frame transmitted from the base station, and transmits the measured signal quality to the first wireless communication device.

A non-transitory computer storage medium for storing a program comprising instructions that command a computer, provided in a wireless communication device capable of communication with another wireless communication device via a base station, to function as a control portion executing the steps of:

• causing a transmitting device to transmit a first data frame of a particular frame type to the other wireless communication device via the base station;
• causing a receiving device to receive a second data frame of the particular frame type that is transmitted from the other wireless communication device in response to the first data frame when the other wireless communication device has a direct communication function with the wireless communication device;
• and
• determining, when the receiving device receives the second data frame from the other wireless communication device, that the other wireless communication device has the direct communication function,
• wherein when the wireless communication device determines that the other wireless communication device is capable of the direct communication function, the wireless communication device transmits a predetermined data frame to the other wireless communication device via the base station, and also transmits the predetermined data frame to the other wireless communication device directly, and
• the other wireless communication device sequentially measures signal quality of both the predetermined data frame directly received from the wireless communication device and the predetermined data frame received from the base station, and transmits the measured signal quality to the wireless communication device.

A wireless communication apparatus in a wireless communication system including a first wireless communication device, a second wireless communication device, and a base station that relays wireless communication between the first and the second wireless communication devices, wherein the first wireless communication device is the wireless communication apparatus, the first wireless communication device, comprising:

• an antenna for transmitting a signal;
• a data processing portion for generating, processing and analyzing a plurality of data frames;
• a transmission processing portion for processing the plurality of data frames received from the data processing portion, analyzing the plurality of data frames received from a wireless interface, and supplying the plurality of data frames to the data processing portion, the wireless interface generating a signal based on the plurality of data frames supplied from the transmission processing portion and decoding the plurality of data frames;
• a control portion for controlling a reception operation and a transmission operation of the first wireless communication device;
• a storage medium for storing the plurality of data frames;
• a relay data frame processing portion for generating, processing and analyzing a dedicated relay data frame as a specific data frame;
• and
• a measurement portion for measuring a quality of the data frame received from the second wireless communication device,
• wherein the first wireless communication device is capable of direct communication with the second wireless communication device, and transmits a first data frame of a particular frame type to the second wireless communication device via the base station,
• wherein if the second wireless communication device is capable of the direct communication, when receiving the first data frame of the particular frame type, the second wireless communication device transmits a second data frame of the particular frame type via the base station,
• wherein the first wireless communication device determines that the second wireless communication device is capable of the direct communication when the first wireless communication device receives the second data frame from the second wireless communication device,
• wherein the first wireless communication device transmits a predetermined data frame when the first wireless communication device determines that the second wireless communication device is capable of the direct communication,
• wherein the base station transmits the predetermined data frame to the second wireless communication device when the base station receives the predetermined data frame from the first wireless communication device, and
• wherein the second wireless communication device measures signal quality of both the predetermined data frame transmitted from the first wireless communication device and the predetermined data frame transmitted from the base station, and transmits the measured signal quality to the first wireless communication device.

A wireless communication apparatus in a wireless communication system, comprising:

• a first wireless communication device;
• a second wireless communication device;
• and
• a base station that relays wireless communication between the first and the second wireless communication devices,
• wherein the first wireless communication device is the wireless communication apparatus,
• wherein the first wireless communication device is capable of direct communication with the second wireless communication device, and transmits a first data frame of a particular frame type to the second wireless communication device via the base station,
• wherein if the second wireless communication device is capable of the direct communication, when receiving the first data frame of the particular frame type, the second wireless communication device transmits a second data frame of the particular frame type via the base station,
• wherein the first wireless communication device determines that the second wireless communication device is capable of the direct communication when the first wireless communication device receives the second data frame from the second wireless communication device,
• wherein the first wireless communication device transmits a predetermined data frame when the first wireless communication device determines that the second wireless communication device is capable of the direct communication,
• wherein the base station transmits the predetermined data frame to the second wireless communication device when the base station receives the predetermined data frame from the first wireless communication device, and
• wherein the second wireless communication device measures signal quality of both the predetermined data frame transmitted from the first wireless communication device and the predetermined data frame transmitted from the base station, and transmits the measured signal quality to the first wireless communication device.